The new (free) Internet Explorer Developer Toolbar Beta provides a variety of tools for quickly creating, understanding, and troubleshooting Web pages.
DCOM Explorer – View, Search, and Modify using the Document Object Model (DOM)
Quickly Disable
Cache
Images
Cookies
Scripts
Popup Blocker
Special Views
Class and ID Information
Link Paths
Tab Index Values
Access Keys
Draw Outlines to help in web designing
Table Cells
Tables
DIV Elements
Images
Validate Code: Internet and Locally
HTML
CSS
RSS Feeds
Links
Web Application Interface (WAI)
508
Disable Image Properties
Dimensions
File Sizes
Path Information
Alternate (ALT) text.
Image Report
Screen Resize
640 x 480
800 x 600
1024 x 768
1280 x 768
1280 x 1024
& Custom
Quickly Clear
Browser Cache
Browser Cache for This Domain
Session Cookies
Cookies for Domain
View Cookie Information
Floating Alignment Ruler with these options:
Snap to X/Y Axis
Snap to Element
Hide Tick Marks
Hide Endpoints
W3C World Wide Web Consortium Resource Links
Microsoft Internet Explorer Team Weblog
The Road to Know Where 
This toolbar is extremely buggy and doesn’t even come close to the quality and diversity of Mozilla’s Developer toolbar, which is already fully featured and working.www.chrispederick.com/work/webdeveloper/
This version of the toolbar has only been availble for less than 24 hours — and you’re saying that it’s "extremely buggy" — how would you know???
thanks for mentioning its so reliving that some one is there to guide you :)